Tactical Doom

Tactical Doom is a class-based PWAD for Skulltag, created by Matthew Krehbiel (Ghastly) and Aerial. It features gameplay akin to tactical first-person shooters, with more realistic weapons featuring recoil and reloading. It also features a ranking system, with experience points that are gained throughout the mod. It can be played in single player, but it is primarily meant for player-versus-player deathmatch. The last version to have been released, dubbed Beta 4, dates to September 26, 2011.